Oven for producing coke and gas



1941- P. HILGENSTOCK OVEN FOR PRODUCING COKE AND GAS Filed Aug. 15, 1939 2 Sheets-Sheet 1 Fig.1

A Ex m,

Dec. 30, 1941. p HILGENSTOCK 2,268,483

OVEN FOR PRODUCING COKE AND GAS Filed Aug. 15, 1939 2 Sheets-Sheet 2 Fig.4-

Inventor:

Patented Dec. 30, 1941 OVEN FOR PRODUCING COKE AND 'GAS Paul Hilgenstock, Bochum, Germany Application August 15, 1939, Serial No. 290,245 In Germany August 18, 1938 6 Claims.

The invention relates to coke and gas producing ovens of the kind in which gas is burnt for heating purposes in vertical flues formed in the walls between the coking chambers, the gas being diluted with products of its own combustion in order to secure more uniform distribution of heat. It has been proposed to operate in this way by simply deflecting back part of the products of combustion, in the flues in which the gas is burnt, so that in each flue there is a stream of burning gas and an oppositely directed stream of products of combustion, these products being, by the injector action of the nozzles introducingthe fresh gas and air, caused to mingle with the fresh gas. For this method some advantages may be claimed, both in the case of installations where the waste heat is used for raising steam or like purpose and in installations with regenerators, but there is the difficulty that the two streams of gas referred to tend to produce eddies or turbulence which is not conducive to smooth and regular operation. Another method which has been proposed is that of making openings at top and bottom of the walls between the flues, and using only alternate flues for the introduction of fuel gas and air, the intermediate flues serving for the downward draught of products of combustion which they receive through the wall apertures at the top and discharge into the fired flues through the apertures at the bottom. This method ensures more regular flow of the gases, but it does involve some weakening of the dividing walls between the flues, because the apertures referred to have to be fairly large. As the &

walls are .generally relied on to take some part in supporting the roof, besides acting as parti-- tions, the weakening thereof is not desirable.

For avoiding this I adopt in my invention a device which leaves the dividing walls intact, with each flue carrying two oppositely directed streams of gas (fuel gas and products of combustion), but with greater precision in the flow of the two streams than is obtained where no structural provision is made for regulating the flow.

The novel device referred to consists of two guides or stream dividers built into the flue above and laterally of the nozzles so that they direct the upward stream, either for only a short distance or through a considerable length of its path, and thereby create or increase the downward suction at the sides whereby products of combustion are caused to descend before sweeping inwards under the two guides or dividers.

Three examples are shown in the accompanying drawings, in Figs. 1 to 3, Fig. 4 and Fig. 5 respectively.

Fig. 1 is a vertical cross-section of part of a bench of ovens,

Fig.- 2 being a longitudinal section taken through one of the walls having flues therein,

and I Fig. 3 being a horizontal section of the wall.

Figs. 4 and 5 are vertical cross sections of flues, showing the other two examples.

Referring first to Figs. 1 to 3, the flues A have at the bottom nozzles D to which fuel gas is supplied from gas mains B. There are regenerators E, which may be of checker-work but are not so shown, The regenerators may serve only for heating the air for combustion, or for heating both air and fuel gas. In each flue there are two guides or stream dividers D above the nozzles, facing each other with a channel between them so that they may be regarded as an extension of the nozzles with lateral inlets for products of combustion which have been deflected from the outlet of the flue and have swept downwards along the walls. The stream dividers perform the double function of increasing the upward rush of burning gas and increasing the downward suction of products of combustion, which are mixed with the fuel gas in the passage between the parts D. The tendency to turbulence is greatest at the bottom of the flue, and this is counteracted by the parts D. It has also been found of value to counteract a tendency to turbulence at the top of the flue, where some of the products of combustion are deflected, and for this purpose it is very effective to give the flue a vaulted roof curved from the side walls of the flues to a center point, as shown at L.

The injector effect at the bottom is improved by making the inner faces of the stream dividers convex as shown in Fig. 1. are fiat.

In the modification shown in Fig. 4 the stream dividers D' extend upwards to a considerable height, say three-quarters or more of the height of the flue. Such extension of the dividers is desirable more especially in the case of very high chambers and flues.

In the modification shown in Fig. 5 there are similarly extended dividers, but the same have slots F, upwardly inclined from the outside to the inside faces, so that some products of combustion will be sucked in before they reach the bottom of'the flue. The flow can 'be controged toa considerable extent by selection of an 'appropriate number of slots of suitable size.

The outside facesv v what I claim is: 1. A coke and gas producing oven having vertical flues in the walls between the coking chamdividers are convex and the outside faces flat.

3. A coke and gas producing oven as claimed in claim 6 wherein the stream dividers have slots for admitting products of combustion from the descending stream to the ascending stream.

. 4. A coke and gas producing oven as claimed in claim-1 wherein" the fines have four-point arched or groined roots for downward deflection of products of combustion.

5.A coke and gas producing oven having vertical flues in the walls between the coking chammajor part of the height oi. the flue.

beta, for the combustion of gas introduced through lines at the bottom, with simultaneous downward flow, in each flue, of products of combustion tor diluting the fuel gas, each flue having therein above the nozzles two guides or stream dividers with a e between them operating as an extension or injector nozzle, the inside faces of the stream dividers being convex and the outside faces being flat and extending upwards through a major part of the height of the flue.

6. A coke and gas'producing oven having vertical flues in the walls between the coking cham bers, tor the combustion of gas introduced through flues at the bottom, with simultaneous downward flow, in each flue, oi-products of combustion for diluting the fuel gas, each flue having therein above the nozzles two guides or stream dividers with a e between them operating as an extension or injector nozzle, the stream dividers extending mrwards through a PAUL HILGEN STOCK. 

